<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>500 服务器错误</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background: #f8f9fa;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .container {
            text-align: center;
            max-width: 600px;
            background: white;
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
        }

        .error-code {
            font-size: 5rem;
            color: #ff6b6b;
            margin-bottom: 20px;
            font-weight: bold;
        }

        .error-message {
            font-size: 1.5rem;
            color: #343a40;
            margin-bottom: 25px;
        }

        .error-description {
            color: #6c757d;
            line-height: 1.6;
            margin-bottom: 30px;
        }

        .action-buttons {
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            padding: 10px 20px;
            border-radius: 5px;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .btn-primary {
            background: #20c997;
            color: white;
            border: 2px solid #20c997;
        }

        .btn-primary:hover {
            background: #199d76;
            border-color: #199d76;
        }

        .btn-secondary {
            background: transparent;
            color: #6c757d;
            border: 2px solid #6c757d;
        }

        .btn-secondary:hover {
            background: #6c757d;
            color: white;
        }

        .btn-refresh {
            background: #4dabf7;
            color: white;
            border: 2px solid #4dabf7;
        }

        .btn-refresh:hover {
            background: #339af0;
            border-color: #339af0;
        }

        @media (max-width: 480px) {
            .container {
                padding: 25px;
            }
            
            .error-code {
                font-size: 3.5rem;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="error-code">500</div>
        <h1 class="error-message">服务器遇到意外错误</h1>
        
        <div class="error-description">
            <p>我们正在努力修复这个问题，可能的原因包括：</p>
            <ul style="list-style: none; margin-top: 10px;">
                <li>• 服务器临时维护</li>
                <li>• 请求处理异常</li>
                <li>• 资源暂时不可用</li>
            </ul>
        </div>

        <div class="action-buttons">
            <button onclick="location.reload()" class="btn btn-refresh">刷新页面</button>
            <a href="/" class="btn btn-primary">返回首页</a>
            <a href="mailto:support@example.com" class="btn btn-secondary">技术支持</a>
        </div>
    </div>
</body>
</html>